JPS643537Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a device for fixing the starting end of a welding wire to a winding frame, and particularly to a device that can securely and automatically fix the tip of a wire.

(Prior Art) When welding wire is wound on a winding frame such as a spool in an aligned or twill manner, it is necessary to fix the starting end of the wire to the spool prior to winding. Conventionally, various methods of securing the tip of the wire have been proposed, and a typical example thereof is shown in FIG.

In the embodiment shown in FIG.
The wire W is inserted into a wire locking opening 3 provided in the opening 3 to lock the wire W in the opening 3.

(Problem to be solved by the invention) In the conventional wire fixing means described above, the part beyond the bending point A is bent and stretched in the direction of the arrow due to the tensile force applied to the wire at the start of actual winding. ,
There is a drawback that it comes off from the locking end. In addition, when winding flux-cored wire, since the bending radius of A is small, cracks occur at this bending point and break due to the tensile force of the wire at the beginning of wire winding, making winding operations impossible. There is. As described above, the conventional wire fastening means is insufficient in securing the wire securely, and there is a risk that the wire may be cut.

(Means and effects for solving the problems) The present invention prevents the wire from being cut and also enables secure fixation. That is, the present invention includes a cutter that cuts the wire and forms a bent portion at the starting end of the welding wire near the reeling frame for winding the welding wire, and a cutter that holds the starting end of the wire and directs it toward the wire insertion opening of the reeling frame. A wire holding and moving device is installed to push the starting end of the wire into the opening and press the wire against the winding frame at the beginning of winding. The present invention is characterized in that a wire bending pin is provided to clamp the tip of the wire, and a pin holding mechanism is provided on the outside of the flange for attaching the winding frame to provide rotation around the axis and reciprocating motion to the pin.

By configuring the present invention in this way, the starting end of the wire is bent and then inserted into the opening of the winding frame.
After the tip is held by a bending pin, the pin is rotated around the axis to form a ring-shaped bent part on the wire, and the wire is pressed against the winding frame by a presser roller before winding is started. This securely locks the starting end of the wire to the winding frame.

Embodiments The present invention will be described below based on embodiments shown in the drawings. FIG. 1 is a side view showing a specific example of the wire bending/pushing mechanism constituting the fastening device of the present invention, and FIG. 2 is a side view showing a specific example of the wire bending/pushing mechanism constituting the fastening device of the present invention. It is a side view which shows an example.

Note that the winding frame 1 for winding up the welding wire is
As shown in the figure, it consists of a winding drum 2 for winding the wire W, and flanges fixed to both ends of the drum 2 in the axial direction. A wire locking opening 3 into which the starting end of the wire is inserted is formed near the flange at one end of the winding drum 2.

As shown in FIG. 1, immediately before the installation position of the winding frame 1, upper and lower cutters 7A and 7B are installed on the cylinders 8A and 7B for forming the final end and starting end of the wire W and applying a relatively large bending radius. 8B, the wire holder 6 is movable between the chain line position and the solid line position in the figure by means of a rotary lever 18 with a rotary fulcrum 17 and a cylinder 9, and is used to clamp the wire. Then, the starting end of the wire after cutting is moved to the opening of the winding frame. Further, above the winding frame 1, a presser roller 5 is mounted on the tip of a rotary lever 19 and is installed to push the starting end of the wire that has been moved to the opening position by the holder 6 into the opening. ing.

In the case of winding a flux-cored wire, the cutters 7A and 7B provide a bent portion having a large radius (approximately 2 to 5 times the radius of the wire) at the tip that will become the starting point of the next wire when cutting the wire W. Therefore, it is necessary to form a cutting edge with a predetermined large radius on the lower cutter 7B as shown in the figure.

FIG. 2 shows a mechanism for applying a second bend to the starting end of the wire pushed into the opening by the mechanism described above. That is, in the figure,
4 indicates a flange for attaching the winding frame, and the flange 4
A horizontal hole 20 is bored at a location close to the opening 3 of the winding frame 1, and a pin for wire bending is provided on the outside of the winding frame mounting flange 4. A mechanism is provided for holding the pin 10 so that it can be inserted therethrough and for imparting rotation around the axis and reciprocating motion to the pin.

As shown in FIG. 2, this mechanism includes a holding and moving table 14 that rotatably holds the rear end side of the pin 10;
A fixed base 15 on which the movable base 14 is mounted so as to be movable in the pin axial direction via a cylinder 16, and a rack 12 that meshes with the pinion gear 13 fixed to the pin 10.
It is composed of a cylinder 11 for rotation around the pin axis, which has a cylinder 11 at the tip of the rod. Note that pin 10 is the third
As shown in the figure, the tip has a forked shape into which a wire can be inserted, and is tapered to facilitate smooth insertion of the wire.

Next, the operation of the above example will be explained.

First, a starting end of the wire W to be wound onto a desired winding frame 1 is formed, and this operation is performed by simultaneously cutting with the cutters 7A and 7B and processing a bent portion having a predetermined radius. This wire starting end is guided to the opening 3 of the winding frame 1 by the holder 6 and pushed into the opening 3 by the presser roller 5.

The starting end of the wire protruding from the opening 3 into the inside of the drum 2 is inserted into the fork at the tip of the pin 10 which has been pushed out by the cylinder 16 and is waiting (see Fig. 3), and then by the operation of the cylinder 11. By rotating the pin 10 around the axis via the gears 12 and 13, the starting end of the wire rotates about 120 times while being held between the pins 10 and is bent into a ring shape (see FIG. 4). Immediately after bending the starting end of the wire, the cylinder 16 retreats, and the cylinder 1
1 also moves back and returns the pin 10 to its original position.

In this manner, winding is started while the wire W is fixed within the drum 2 of the winding frame 1. At this time, the wire pressing roller 5 is released after the winding frame 1 rotates 2 to 5 times while pressing the wire W against the drum 2.

(Effects of the invention) As explained above, according to the invention, the starting end of the welding wire can be quickly and firmly clamped to the reel, and even when bent with a large radius, it will not come off the drum. There is no.
In addition, the present invention has made it possible to completely automate the wire winding work.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a mechanism constituting the wire fastening device according to the present invention, FIG. 2 is a side view of another mechanism constituting the wire fastening device, and FIGS.
The figures are explanatory diagrams sequentially showing the operation of the apparatus of the present invention. FIG. 5 is an explanatory diagram of conventional wire fastening. W...Wire, 1...Reel frame, 2...Drum, 3
...Wire locking opening, 4...Flange for attaching the winding frame, 5...Press roller, 6...Holder, 7...
Cutter, 8, 9, 11, 16...Cylinder, 1
0... Wire locking pin, 12... Rack, 13
...Pinion, 14...Moving table, 15...Fixed table.

Claims (1)

[Scope of utility model registration request] Near the reel for winding welding wire, there is a cutter that cuts the wire and at the same time forms a bent part at the starting end, and a wire that holds the starting end of the wire and feeds the wire toward the wire insertion opening of the reel. A holding and moving device, a presser roller that pushes the starting end of the wire into the opening and presses the wire against the winding frame at the beginning of winding are installed, and a winding frame mounting flange is inserted to clamp the wire end that comes out of the opening. A wire bending pin is provided at the starting end of a welding wire, and a pin holding mechanism is installed on the outside of a flange for attaching the winding frame to give the pin rotation around an axis and reciprocating motion. Fastening device.